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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1afde05d1894ad3b83d151ac4b3d8d0e40b2ab30706cbbdc7a671ba43e45294' 
  AND token = 'lTmHIqrRG92tmAGc13+53TkJKY7cC9dzylUR6C8UCNc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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