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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c1cf486a6f9aa81c0390b7b1323b1c8aaa1be398e163ada08626e4f2ce4705f' 
  AND token = 'WrsqC330JjPSfVi3jHd9S6u87SAD91RExvWTGJOk3OE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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