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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89acc25425b5ae70dd667668e7fa541bf27cd36bd58a91891c739b3e6ed20b7f' 
  AND token = 'cY46rU3I25PH3v0s/Ttxp4DtLxf9BrcdhfRiV2IGc0U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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