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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74200d82b728559f424e01ab5d88982227a4af5bf8f1751c4d1d931810bd2859' 
  AND token = 'reKFR69UbaefYOw7iDawLefR7226/QE/7TdAxRqzsuU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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