SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e467947d6688ccd6fe2b13ab3378fda20f4265944035c38e5b679a0dc50b652' 
  AND token = '9ojJpDK8KGjAU8BZPoQLfJ4upY4PzPlPG/xSY24oIfo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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