Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93aba85493bcfe067b4aafa9fe22d52eb32ba5bf669dce5071ae534934991632' 
  AND token = 'OHTIY6YNbEli2uXRdEkAoD+OPRqqoNcUuwCFXsEXZn8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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