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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0afaeb277c7b8edff074e3e23efd15d13ce371316cdbc8970065e36f11dbd877' 
  AND token = '8hQ5/3FyyBdDA06T48RBiKYPAsrIKZl9bSXaSuN+4qU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}