Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8aec4bb7530d16e0d0c9a4462ecb26a925cacc4d39e63f9ca9fe3921dc7a3c33' 
  AND token = 'HL9QhlJVdhfU8FH/Cc7YXVJvFyN57UlXXx2MghfEnUM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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