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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8565f37263e75322fadf155e61beff5fc2cf157e5f77bcef307e4e6c6327c575' 
  AND token = 'pTNoABX4n3OMkJCfJfkqczn3nfo3QlyGkK/SUIldl3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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