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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fa2d523e210b650d57875b224cd3c9c8cb301e8ed3c50076aa0cc6e7eb26b805' 
  AND token = 'JaWKIBstOtdbt1a7o+05N6kCnsykPGx8CZrEIEjBITw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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