Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a481d98c69041a63feb97038f61fbfcd0990a090fe380ade8db89f90c1a063a' 
  AND token = 'g3xTAOdnm4gBNskw4ptoqsRTD36KLtaB1LN1ZezHUBc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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