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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9818f7b281be85c56f7e24fec49100c40adb8534ccb22043ae579777f4a77249' 
  AND token = 'pbT6qRZ0JAggj99R5sezpQZ6PxCfmw5X3JST7SBqino=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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