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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1ab8a167ab575fc9a9f8a280b3d25ddfb052fc97f2bcb11d0952cfe2dc66cb6' 
  AND token = 'II/zK0nBCO8VRzOgD/Q0EmcQUN/iGbQHeiJHHkd+TPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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