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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a216a7624896268a24e9f76d8f5e80ebb195575a4e6306e3e79f848085ebb3ba' 
  AND token = 'RtIF7gMqfQ449+fq+CIwSS66DwJuDPj9T7Nfwc4DF2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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