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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01ad7194a3cb68bb5d277185dae0a1e02292f84dc4a095896b7e44cdda14efbc' 
  AND token = 'k4iZ+ywaVaQ/uhMmgXNkIzY5yrYum8ibcVeKh2qclWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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