SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '278387e89a4b5aa5306b7779495ff84251d48e7171d6e7ab9fe2865d89709533' 
  AND token = 'cH+HRFzAL0x7uTOrsxTh8/iLGZ6VxMczfUBq8K+LTHU=' 
  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"
    }
  }
}