Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '919a042a6edc2ad10a1929f1d0b25cfabf8de84dca1aca4546f23d3c18cbf360' 
  AND token = '1vi1I97qw1cvB0DAKW6E08/Fo/i/KrZzOiaAAfBVAvU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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