Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0659931cf24ea771395d20a729da78a5e43a98b6b313a2663e2c683523214ed4' 
  AND token = 'huVQxxmYC3/EE3xhS2Bfjq5KjI9Krhkysj110vepTWE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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