Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e7248a90345b62df0a130ff3adc6e41ecdc298c89b0b6f0ff6b87e0a0240129' 
  AND token = 'LoaIgtcXU9hH+nbPK7pQXQ/SJ6QAdyhj6Q4cSf1LJ20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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