Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '37c823905cb67e57e04a62e5a3d6384895e01e0f35eb583b70109190750629f7' 
  AND token = 's7u+/X2dzqnX/faE78dTbyZVR6Yi29wKy9eayg7JKHs=' 
  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"
    }
  }
}