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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a09a5c809bc1247dbdfadc15c1217c84c9b1c032dea61316a33cc9132c67733' 
  AND token = 'gQW4fxFGkbpF/LFrznlQLGkQHRSTi5ioiWApdtbQ1zY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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