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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85079b9fc4c4f1a0eb20d2f7ed2912a0029c27397d466e6e1665563224672258' 
  AND token = 'J8EntLczUBQofhIvf7cqFSR4dNCkdvd/yedUCJukDdM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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