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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ccea6b47688542cff6651fa3cf704e19e2cfd6978a04a40500f856fdaa230ee' 
  AND token = 'Ut9wrgcZTLH47RVI1yzIb4vrotF16naebXWOwVit2b0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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