Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01fe1c2cde1437db744d39e62fbb771ea5893c56b4530e49fb8073733a5fd57e' 
  AND token = 'usucKMeISy746FU4qSDL6g4kfhdAuBcSrrPNbBogdwI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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