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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df32c871a457a4d9423e895ecd51efd0a03d16c18f872db54a3d7634f7288025' 
  AND token = 'Vh3kIXIdTSjnusRGe3pUwM8TjnAG2ze+kenbtq9e8v4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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