Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a1c0e67d1f06b20aa3d7f02d8a7f53f8ba386f1a6e55401fbd6fe4aed371f2e9' 
  AND token = 'uj2msO77qFWrIuqzh8pcRwjMGvbSOUNRBPMp7uylrbU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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