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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '23d379aa975efbff11e68b5b7962f5873661d7aa5532baa851987fe0770218bd' 
  AND token = 'i1pIolyQf6QaZl6YSHWME2Kh2yeoFCmpW5tzIoOE8Bo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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