SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '438a49e056632862061942244d03fcec166bcfb4b64e702f1cabf52f40c9e858' 
  AND token = 'MJ081qnjBy0bC+r7PgFEzVG1/5F0QaG3RHMy+j1V7Uo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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