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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3dd65ea1cf6a2d6d7ff32e234ae3c55957ae24188432e0ab0b2de0ac98590351' 
  AND token = 'S/5SQHrVaaTs1KiDvsOGl4ikZzuZumjUo4zC+LR+U6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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