Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce8cd27b682e12c23b4374805c442c4b32e1be0177470a46735331fe0b1500a7' 
  AND token = 'CGCJS12TJ/TGhM5DPZP8KUlg8dhB7KkcxKSc2xn6dEw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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