Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7884d749c5064fc245fa509bdd158da6c555e9c03e44f19bae14625db5e66958' 
  AND token = '5y1/t0DGbYdRN6NY5BbImbYmF2MuE+2aO3kkpNXuddI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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