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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9eb6d3c898ac492969c4f5e5dd12b51087b9cab6bd211222a29e3b9f3e88e6f0' 
  AND token = '+in69NlBQmCWBQJQLI9Oxln9nWjFZnXUE/q5mTVgJD4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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