Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f84a47d631c08969e0b78b2499d25348e0ad9db9bbb27910d26ad546d8f5a29' 
  AND token = 'U9BbsHMnbEXncuzV0i5n0gXXpItCgVDdLrHeCRsDd54=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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