Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42257029a151015970d80dc4edb8a895993ff11380d53b69d7681cd8a77e8fd4' 
  AND token = 'EfJc5tCnQhjDeXL9JTDMo1jTZGbEC7in8urvtTXN294=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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