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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0733ba1305517ae1e709fef0b88c9b7129496c02dd6c9776a8218d3075f8370b' 
  AND token = 'IsuquYYcgqiKTbQAFHHKNlyFQkUEYP7gCwKIo4OiDTE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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