SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '95a59df63e9b86cf55e98c8efdac385d05812d0b07b4123a0c96a351c0727ad6' 
  AND token = 'phDh3SN0E/Dc+0rXYuL6RFrJJZvVeVSgAt/VLk1PG7g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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