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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ff22340c48ba5edc92cb1f3f3204730e93cc9f3c6309a3f45de9b29edd24880' 
  AND token = 'aem4LoLqWSb70V4ruxIPb8pdxXTmKUUaItawQA1n+to=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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