Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e80d3b3713d1f24bccc7a1092fee41e6d82ff30706c2167c92dc7993edf14bcd' 
  AND token = 'yEQ2/UfzvVi/Hl/0aTcc9d3xs8Qm4TdYXy8bmyYPZD4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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