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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32e3838d80a75454adddc82bcc9e57edb18554cbc8ccf37d8e45ffd05cbcc6ab' 
  AND token = 'OE3lstn0sXjJBuwHLHHiAR1IjgIo5Sbn+62L4w0L89E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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