Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '69d833ae29e4dcce2de1e5957e24b7aa25742c1adad4adaf38fff07815c3c0a4' 
  AND token = 'gxyOyUqcPcuTAVkD0P6HX0MgsTYrgBU9bPqnxVR5IDg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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