Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34a4d619e36cd216b7fd1dc2324c84d326743539f1ceedbb8d948e62badb6974' 
  AND token = 'L+yFwN1qcSBLzgOybXX3x03SK131ZAyFduC3An+tU/g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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