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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89306ebe0976b53059d74bca207df569add786b8058a4855d8d39f5d70725245' 
  AND token = 'm7a26IIw6Z0nyjQoqw9PIBpJhIZTidwb3pPPN7maHaI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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