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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '0bfe8e6600133b40d7520c9cc7b5c3cba7b9a0495888d8af413cac46bfcc9b91' 
  AND token = 'wxw8omx7OHk/R8B307N7/5Q4epW6/CFIY2CJUF+Ev00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}