Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a05a48ceb29aa584eb2d97fa4308d2f3bc4b2f5550d75a4bb6c4bcdf2f939e4' 
  AND token = 'rAmdKeOm3Gdj1EP/7ULp601OdWflW0ejtwqR26xlal0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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