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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84f905279b8c7ee4dc30ab83414bd80a0b08dfd3cc6949f0c719026361b0ee69' 
  AND token = 'iNQNhkUjHZ5DOWJe0PL1iNoxdI5bUHLYVPsTxHaFWO8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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