SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e88ee343a31e3b255cdcad9b65544b70ec7878c41ae2e81564820e6160b74f7e' 
  AND token = 'tjUw0uYZ/x1rjHCHUA0sBWVQaoRKqT7oPQwFvgAc9z4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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