Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df31257c8ee6eac82ed8308049ee653ff4251f5011f9a8437b0a08d373c3cbb1' 
  AND token = '2P7Rk15tGxsnsirarqiPV88UvQfRItJpNBMU+ULyRIE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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