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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '282caacb268e6622b60edf3f6919ea80687b5f9f68f776a06071e423bd8a2cc2' 
  AND token = '9Tu9+wu83NAzUFnZBun3y3KUtr21aFLQv3rZRfij/n4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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