Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b85380df9a916532c22731c3107d777d02c0112d3bc6b60c2441a5b8ea1ff55e' 
  AND token = '4fK7qj+ee5Lv+uHep1P6VptitjytItaYSyjUjvl/Wt0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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