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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '072b4e6e20e0cd3f30b9e4ee5199d579250f9bd71fa626a8c6d90162de8cf2ca' 
  AND token = 'tXohjRQ3UhuI/fSU/Lse767mALjmBzxt9h2JForIGcc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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