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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ded5fdebbac5b0cb4091cb68f19e8a886046bf18bcc6d1ffe91cfdc914ede56' 
  AND token = 'fzM88zQi7/oiLZdrv+/sXl5YZB0IG2f52eHaA4ilvjM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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