Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c17091b7c6c9cfc390c266036ab36070e011de1a5b903924b13cbafc808772c8' 
  AND token = 'OMH0X16cXbqbcNgaSXcfvb+7qR9NcEFYn0Bpj+nDb78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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