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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2edcb85b064b47b6a3b72d990c7257ab15c80c6dfce7caa2d7a4cebf272dcb25' 
  AND token = 'IP/TXF1YCfNoM+RvJUCn/QV/hx/HR/o+N51rk9Vddlg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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