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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d38b26ac0622cfbc4d341a24eba0c9764cbed0798afc8fa9712f52ef6f5bd94' 
  AND token = '9gjbS5a2Py0zhD11/YAHI6ForkP58u9GQHXJPpy5W68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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