SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f431d3b3572159be0ff3068ff36beefa4722e39ffd769d4e7bbdb5cdab51e7d8' 
  AND token = 'I2C6ylY4Afm1H9Brv3qfCZh4D6XNUhMYDK+6f9GwJVM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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