Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2133f4d5ee8ddc520df614e739d1146892147e0faf72c6e67a345db7cca044f8' 
  AND token = 'bMjlrFdq9j56ox2eVu8yZ67ponO7GiuhYqZCIoLInho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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