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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '84e416f8a90f023cdfe7009c3fc6064bf6ec6e428a949c7352ed2fe9175cdf19' 
  AND token = 'w0oZV/xbehB1RFNLSk6yLrZb1K0pHkVGkhTv4+Prha8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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