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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e390deeccbebdb495db1da6c750fe3bbdcc3d022d541356c466ba1fd9cf3d5b0' 
  AND token = '/uxKkoq39DxX6INV7OHF5n0rHZr+Z3Ili12l1npZVLQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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