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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78eca5fe83e3b8787e93e34076ed9efb1b4b2e75287de5b7bc3734df82b446f3' 
  AND token = 'GVONuweP/BP+Zh6c3IGfDhGAE2FxQlyKhq9WtpNtGGc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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