Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ba834f96e21d997d10ae1c39fa4f883322098abe473d39c8f06db0526c009ae' 
  AND token = 'XP/Xvi3uadgdW4iR1crYmB6V0kdRXyPJHWhst/HMgHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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