Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9764290aacae83f9095b0eff47e49e2e557c04ca0fd965bab8651fbc2dafd838' 
  AND token = 'z86TLHp+zECHIUaHjrh0VxHaKsc0fDH1Rif3h0zBxe8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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