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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3305cd6db16076ca04de10b0c3bce8e18ee96c7fbfa3f7171e504e3e1f3bc01c' 
  AND token = '0/A67VPaA/jYLztInaF34ttfmaP8SympwjO6z6ozS58=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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