Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3100c0a6d3b198ef71262c79526629dc7c91849981dc38fdf1f065d2c4c9b00' 
  AND token = 'cz4MY+kX4QAqxFYuLU5ghIdVP5xh14C2R8as3ChAcaM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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