Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1514949a976ed5c427adcbd921d186e475b6abe975c3e55f9b72b92e754ba20c' 
  AND token = 'jm1pUusAUjUhQdTCcixlLJ/eKIZFwnviLbjERzaIo6Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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