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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd93e0d6fdc2f4e05c85c18540e5e8aa057e2ffa77b8303e652a184c3d8999e88' 
  AND token = 'VfbsG0dlV5Zf2Q3gruOJNPJ3zz2TaO1aMY3kWXpBk4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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