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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '30156eef71058ce026e5efbd1547fa080a22e2d1dbbe3f89337baac23e201579' 
  AND token = 'X6wksv6Mcm+7R4blLEo4VKc6lHLEwrMnYqRYRrsDS5s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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