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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4b95ac65449fdad9318999cc605c9f25a45c4cf876c78e17448fe9828bf1e45' 
  AND token = 'A1/NyHbSeJ9kw8uRxJ7k5fuLGzNpMmvw1TEHv0w7hwg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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